Practical Game AI Programming

Implementing vision awareness

Before starting out with the tactics, we will take a look at how we can implement an awareness system into our characters.

Let's start by implementing a vision awareness into our game character. The idea is to simulate the human vision, where we can see very good at close range and not so good when something is really far away. Many games have adopted this system and they all have differences, some have a more complex system while others have a basic one. The basic example can be found especially on a more juvenile adventure game such as Zelda - Ocarina of Time for example, where the enemies will only appear or react when you reach a certain trigger zone as shown in the following screenshot:

For example, in ...